dorsal/arxiv
View SchemaRealization of the 1->3 optimal phase-covariant quantum cloning machine
| Authors | Fabio Sciarrino, Francesco De Martini |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412041 |
| URL | https://arxiv.org/abs/quant-ph/0412041 |
| DOI | 10.1103/PhysRevA.72.062313 |
| Journal | Phys. Rev. A 72, 062313 (2005) |
Abstract
The 1->3 quantum phase covariant cloning, which optimally clones qubits belonging to the equatorial plane of the Bloch sphere, achieves the fidelity Fcov(1->3)=0.833, larger than for the 1->3 universal cloning Funiv(1->3)=0.778. We show how the 1->3 phase covariant cloning can be implemented by a smart modification of the standard universal quantum machine by a projection of the output states over the symmetric subspace. A complete experimental realization of the protocol for polarization encoded qubits based on non-linear and linear methods will be discussed.
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"abstract": "The 1-\u003e3 quantum phase covariant cloning, which optimally clones qubits\nbelonging to the equatorial plane of the Bloch sphere, achieves the fidelity\nFcov(1-\u003e3)=0.833, larger than for the 1-\u003e3 universal cloning Funiv(1-\u003e3)=0.778.\nWe show how the 1-\u003e3 phase covariant cloning can be implemented by a smart\nmodification of the standard universal quantum machine by a projection of the\noutput states over the symmetric subspace. A complete experimental realization\nof the protocol for polarization encoded qubits based on non-linear and linear\nmethods will be discussed.",
"arxiv_id": "quant-ph/0412041",
"authors": [
"Fabio Sciarrino",
"Francesco De Martini"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.062313",
"journal_ref": "Phys. Rev. A 72, 062313 (2005)",
"title": "Realization of the 1-\u003e3 optimal phase-covariant quantum cloning machine",
"url": "https://arxiv.org/abs/quant-ph/0412041"
},
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